Various combinations of these heterochromosomes are shown in figures 272-277.
The unequal pair is shown by itself in figure 101, and the separation of the heterochromosomes is seen in figure 102.
In iron-hæmatoxylin preparations the heterochromosomes of the Coleoptera vary greatly in their staining properties during mitosis.
The two species of Lepidoptera examined have an equal pair of heterochromosomes.
Doubtless the results of other investigators will soon throw more light on the heterochromosomes of this order.
Figures 126 and 127 are anaphases showing the division of the heterochromosomes (l and s).